EP2206580B1 - Device for processing floor surfaces - Google Patents

Description

Field of application and state of the art

The invention relates to a device for processing of floor surfaces, in particular for grinding ground surfaces.

From the DE 3523903 is a floor sander known with wheels and a carriage-like chassis. A drive motor mounted on the chassis drives a sanding belt running over two rollers to abrade a floor surface. Thus, for example, wooden floor can be sanded.

The GB 2303570 A describes a floor sander with brushes in the form of close to each other arranged grinding wheels, which give a total of a kind cylindrical grinding brush. In order to support the cleaning effect of the treatment with the abrasive brush, a supply of cleaning fluid and dispensing device can be arranged above the abrasive brush. The cleaning fluid is added to the brush and transferred from this to the ground or used to clean the soil during the grinding process.

Task and solution

The invention has for its object to provide an aforementioned device, can be avoided with the problems of the prior art and in particular a comfortable for an operator editing a floor surface is possible.

This object is achieved by a device having the features of claim 1. Advantageous and preferred embodiments of the invention are the subject of further claims and are explained in more detail below. The wording of the claims is made explicit reference to the content of the description.

It is envisaged that the device has a rotating processing device for the bottom surface, wherein said at least one brush, advantageously exactly one brush, has for soil cultivation. Furthermore, the device has a drive and a bearing for the processing device or the brush. For a good handling, it is designed in the manner of a car, so it has at least one wheel, preferably at least two. According to the invention, the processing device, on the one hand, has a grinding brush for the abrading processing of the bottom surface, that is to say for grinding. Furthermore, an application brush is provided as an alternative to the abrasive brush to advantageously apply a fluid to the bottom surface thereafter. The two brushes are mounted in use on the same storage and are replaced with each other. For this they are advantageously the same size or have the same external dimensions. Furthermore, the device according to the invention has a supply for the fluid as well as a dispensing device for applying the fluid to the floor close to the brush.

The term brush is to be understood here above all as functional, so above all a brush can be provided with a large number of protruding abrasive bristles, for example made of stable nylon with an abrasive coating. Likewise, the term brush but also an abrasive roller should be understood, which thus has a kind of rough or sandpaper-related and substantially continuous surface. Likewise, surfaces of abrasive fleece or the like. to understand it. The application brush can be similarly varied, so either with individual bristles or as an area, which will be discussed in more detail below. An abrasive brush may have a structure adapted to a grooved wooden floor, that is, solid bristles having a high-low structure. Furthermore, an abrasive brush bristles of silicon carbide have, for example, with grain sizes in the range below 200, advantageously 60 and / or 120, depending on the type of flooring and degree of contamination.

Thus, therefore, with a single device or machine in a first step, a bottom surface can be machined or cleaned or abraded. In a second step can then after replacing the brush against a brush brush a fluid such as a care oil or the like. be applied to the ground ground surface. The circulating application brush not only distributes the fluid on the floor surface, but also works or pushes it in, which is especially beneficial for wooden floor surfaces. The device is thus either used only with the brush or only with the order brush for the purpose.

A replaceability of the brushes on the storage can be as simple and fast as possible, so not too much time is needed, advantageously by means of quick release. Particularly well can be edited with such a device laid on the type of planks wood floor, especially with grooved wood planks. For their cleaning or grinding as well as polishing in oil or care fluid the aforementioned brushes with individual bristles are particularly well suited because of the engagement in the grooves. Here, the device is particularly good for exterior surfaces with wooden planks, which can be grooved longitudinally, as they are often used for outdoor terraces, for example. So they can be cleaned, ground or sanded down and then oiled again.

It can also be used in addition with a cleaning brush, which has, for example made of nylon solid bristles. This is more likely to remove loose dirt and above all a cleaning agent can be processed with which the floor covering can be cleaned before or after sanding. The cleaning agent can be applied in a manner similar to the fluid or care oil, ie with a dispensing device or even the same dispensing device as the fluid, or by hand or separately on the floor covering. Such cleaning can also be done several times between two grinding operations, as it is easier and faster.

The brushes can both be formed in the manner of a cylinder and extend horizontally and transversely to a machining direction of the device. They may be narrower than the device, for example, have a width which is 10% to 30% below the maximum width of the device. Although the widest possible width is advantageous for a larger, simultaneously machined floor area. At the same time, however, a necessary contact pressure is reduced.

In one embodiment of the invention, a named application brush with which fluid is applied to the bottom surface can have a plurality of brush strips which are distributed at a distance from each other in the circumferential direction and which extend across the width of the application brush. Such individual brush strips have the advantage that they can be replaced individually with appropriate wear and not the entire application brush needs to be replaced. Alternatively, integral or one-piece brushes can be used, also as abrasive brushes.

A job brush can be formed in a further embodiment of the invention not only for applying the fluid to the bottom surface, but also for subsequent polishing. This is especially true Oiling wooden floor surfaces is an advantage. During polishing, no more fluid is applied, but merely polished by the rotating application brush the fluidized bottom surface. For this purpose, it may advantageously have bristles made of horsehair.

In an embodiment of the invention it can be provided that the brushes are arranged at an end region of the device, namely at a front or rear end along the machining direction. Particularly preferably, they are arranged at a front end, wherein then at the other end a hand guide device is provided. This serves to move and guide the device. It can be advantageous as a kind of push rod or the like. be educated.

In a further embodiment of the invention, at least one impeller may be provided at the end of the device, which comprises the aforementioned hand guide device or no brushes. Advantageously, there are two each arranged on the outside wheels. This improves the guidance of the device and can also serve to ensure that it or a brush always has a constant distance to the bottom surface. The wheels and the brush can be arranged on the device such that at least a portion of the weight rests on the processing device or brush and thus on the floor surface. So an operator does not have to exert extra contact pressure on it. A weight distribution can be such that at least half the weight of the device rests on the brush. For example, a drive motor for the aforementioned drive can also be arranged in an area above the brush, so that its weight increases the contact pressure. Likewise, a reservoir for the fluid can be arranged in this area.

The dispensing device for the fluid has a plurality of dispensing openings distributed over the width of the application brush, serving as dispensing nozzles are formed because the fluid is applied with pressure. You can advantageously have a distance of a few millimeters to each other, so that over the width evenly distributed spreading is possible.

In the invention, the discharge openings are directed to an area relatively close to the application brush, as seen in the machine direction. This allows a splash-free and direct application to the floor surface.

In an advantageous embodiment of the invention, said dispensing device with the discharge openings be adjustable in their position, ie both distance to the ground and especially at an angle to it. For this purpose, the applicator advantageously before the application brush on a housing or the like. be appropriate for it. In addition, the dispensing device may be adjustable in its spreading width, for example to cover a complete width of a single board of a wooden floor.

In the invention it is provided that the fluid is applied with pressure. For this purpose, the dispensing device is pressurized, advantageously by means of a pressure accumulator. Such an accumulator can be manually actuated or activated. Particularly advantageously, it has a hand pump, with which a container for the fluid supply is pressurized. Alternatively, the pressure vessel is connected to a separate fluid container and pressurizes it. As a result, possibly more fluid can be applied. Furthermore, it is possible that it is applied at high pressure and discharge nozzles as a fine spray, and not just dripped out when spreading.

In a further embodiment of the invention, a metering device for the dispensing device can be provided. She can, for example have a valve that can be adjusted by hand. Thus, an adaptation of the application rate of the fluid to different conditions can be achieved, in particular if the metering device can be operated or actuated, for example, by the aforementioned hand-held device. For this purpose, for example, a Bowden cable or the like. be provided from the metering device to a handle or a handle on the hand guide device. Thus, during the processing of the bottom surface, the application rate of the fluid can be adjusted.

In yet another embodiment of the invention can be provided that the discharge device for the fluid has a connection for a fluid container. This can advantageously be a threaded connection or other quick connection. Advantageously, an adapter may be provided to fluid containers or fluid containers with different To connect thread sizes to the connection. A fluid container can either be a fixed tank, which is advantageously filled from above. Alternatively, finished fluid containers can be attached, for example, screwed to the said connection and held so.

In a further advantageous embodiment of the invention, a guide wheel may be provided on the device, for example in the area close to the processing device or brush. This can not only set a height above the floor surface, but also provide a longitudinal guide. For this purpose, a guide wheel can advantageously be made so narrow that it engages in grooves or joints of a floor covering laid in the manner of floorboards and is thus guided. As a result, an exact longitudinal guidance can be achieved without an operator having to concentrate exclusively on it.

In order to facilitate a movement of the device, the rotating brush can be used, so to speak, as a drive for a preferred machining direction. Its direction of rotation can be designed to drive the device in this direction.

In yet another embodiment of the invention can be provided that the grinding dust is removed from the brush by means of a suction. For this purpose, suction openings should be provided close to the processing device or the brush and the bottom surface. So should be able to be achieved that dust is sucked almost directly at the point of origin.

In a further embodiment of the invention, a cover may be provided around the processing device or the brush around. It can reach at the free end of the device until shortly before the bottom surface to be processed and a large part of the circumference of the brush surround. This serves on the one hand as a collecting device for grinding dust during grinding as well as splash protection during application of the fluid. The cover may be removable to facilitate either the replacement of the brush or depending on the processing step to install an optimally adapted cover can.

These and other features are apparent from the claims and from the description and drawings.

Brief description of the drawings

Fig. 1

eine Seitenansicht einer erfindungsgemäßen Vorrichtung als Maschine zur Handführung,

Fig. 2

eine Draufsicht auf die Maschine aus Fig. 1,

Fig. 3

eine vergrößerte Darstellung einer Bürste mit durchgängiger äußerer Oberfläche und

Fig. 4

eine alternative Ausbildung einer Auftragsbürste.

An embodiment of the invention is shown schematically in the drawings and will be explained in more detail below. In the drawings shows:

Fig. 1

a side view of a device according to the invention as a machine for hand guidance,

Fig. 2

a plan view of the machine Fig. 1 .

Fig. 3

an enlarged view of a brush with a continuous outer surface and

Fig. 4

an alternative training a job brush.

Detailed description of the embodiments

In Fig. 1 a machine 11 according to the invention is shown as a device described above for processing a floor surface in the form of a wooden floor 12, which consists of individual plank-like wooden floorboards with joints 13 therebetween, especially at an outdoor terrace. The machine 11, as can also be seen from the top view Fig. 2 however, constituting only a part of the machine 11, a left side support 15a and a right side support 15b forming part of a frame. On the side rails 15, a housing 16 is arranged, which occupies the rear two thirds of the machine 11. In this housing 16, for example, a power electronics can be arranged.

When viewed at the rear end of the side supports 15a and 15b in a machining direction R, an impeller 17a or 17b is provided on each of which the machine 11 runs. They are not driven.

In the front region of the side support 15, they carry between them a processing device in the form of the abrasive brush 19, which is formed substantially round cylindrical and has bristles 22 on a brush body 21. For this purpose, more will be done below. The abrasive brush 19 is mounted on a non-illustrated, for the skilled person, however, easily realized storage, in particular a continuous, connected to the side members 15 axis. To replace the brush 19 against another brush or the order brush, this storage can be quickly and easily detachable. By means of a drive motor 25 on top of the housing 16 and a belt drive 26, the brush 19 is driven or rotated in a manner known per se, namely, in Fig. 1 counterclockwise. Thus, it can support a movement of the machine 11 in the machining direction R.

Furthermore, the machine 11 has a stem 27, which extends in the illustrated embodiment of the housing 16 from the front. It may alternatively be attached to the side rails 15. It can be designed, for example, in the manner of a transverse traverse. At this stem 27 is located above a connecting thread 29, on which a fluid container 31 is screwed. Instead of such a connection thread 29, a different connection may be provided, possibly also as elastically formed plug or the like. The fluid container 31 may be a substantially permanently installed container or tank, which is then refilled in each case with fluid. Furthermore, he carries on his top a pressure pump 33 with a handle 34, which is optional. By moving the handle 34, for example, up and down as shown by the arrow, the pressure pump 33 can generate an overpressure in the fluid container 31. This can cause a pressurized spreading of the fluid for higher amounts or also, for example, via nozzles or the like. Not only let it drain, but also to atomize for a finer and better distributed spreading. Instead of a manually operated pressure pump 33 and an electrically driven pump may be provided.

As an alternative to such a substantially permanently installed fluid container 31, a conventional fluid container can be connected and attached to the connecting thread 29, for example a can as a fluid container, as can be purchased normally. Here could odgl by means of an intermediate tank. also a prescribed pressure pump can be used for pressurized discharge of the fluid.

The fluid passes from the fluid container 31 via a metering valve 36 and a fluid line 37 to a Ausbringdüsenleiste 38. This extends according to Fig. 2 approximately over the width of the brush 19. By means of the metering valve 36, the discharge of the fluid can be started and the application rate set, as will be explained below.

The Ausbringdüsenleiste 38 may be a tube with multiple holes in a simple configuration. In this case, nozzles or spray nozzles are provided for the fluid, because a pressurized application takes place. By spraying the fluid above all a better and more area distribution can be achieved directly on the floor surface.

The machine 11 has a push rod 40 secured to the housing 16, alternatively to a frame. This can be adjustable in height and has at its end a transverse handle 41. Thus, the machine 11 can be moved, in particular pushed in the machine direction R and pulled against this direction. Usually, such a processing of the wooden floor 12 by forward and backward movement of the machine 11. On the handle 41 is a metering lever 42 which is connected by means of a Bowden cable 43 with the metering valve 36. Thus, so to speak, the amount of fluid dispensed during the processing of the wooden floor 12 can be set permanently and as needed.

As a further possibility, the fluid container 31 may also be arranged on the push rod. So it is also easy to reach, and does not disturb the view of the area in front of the machine 11. Also, a pressure vessel can be arranged here.

Furthermore, in the plan view Fig. 2 in the right front area a guide wheel 45 is provided. This is very narrow or on his Outer edge very narrow, advantageously a few mm, so that it can intervene in the joints 13 of the wooden floor 12, so to speak, and ensures a safe and accurate longitudinal guidance of the machine 11. Also, the guide wheel 45 is not driven in a simple embodiment of the invention, but it could be, similar to the wheels 17. Advantageously, it is provided that the weight of the machine 11 in the front not only rests on the brush wheel 19, but in addition a support by the guide wheel 45 takes place. This is less of a benefit during sanding than after application or application of the fluid. For this purpose, the guide wheel 45 can be raised or lowered with an adjusting device, not shown, in relation to the brush 19 or its storage. Such adjustment of the guide wheel 45 is advantageously designed manually and continuously.

Around the abrasive brush 19 around a splash guard 28 is provided as a cover, which also serves as protection against injury from the brush. It may advantageously also be attached to the stem 27 and be designed to be easily replaceable. The fluid line 37 passes through it, as well as the Ausbringdüsenleiste 38 is provided below the splash guard 28. Advantageously, it is outside of the splash guard or front of it, so it can be better adjusted from the outside. Not shown, but easily realized by those skilled in the art, is a dust extractor dust generated by the abrasive brush 19, wherein the suction is advantageously provided on the box-like splash guard 28. A suction unit for this can be provided either in addition to the machine 11 in the usual way, especially with a kind of dust bag, for example, generally attached to the guide rod. Alternatively, it may be provided a suction tube supplied by an external suction. An industrial vacuum cleaner or the like for an external suction can remain stationary or be dragged while editing or grinding.

In Fig. 3 For example, an application brush 20 is shown having a brush body 21 having a continuous surface 24, such as absorbent material such as foam or fabric. It can also be provided that the surface 24 is removable from the brush body 21 for easier replacement when worn or to adapt to different processing steps.

In Fig. 4 an embodiment of an abrasive brush 19 is shown. Here brush strips 23 are placed in a brush body 21, for example screwed. Of the brush strips 23 are the individual bristles 22 side by side. With such a basic construction, both a brush 19 and a brush 20 can be realized.

Claims (16)

1. Device (11) for processing floor surfaces (12), the device having a rotating processing unit for the floor surface with at least one brush (19), a drive (25) and a mounting for the brush, and the device (11) being constructed in the form of a trolley, the processing unit having an abrasive brush or an abrasive roll covered with abrasive paper for the ablative processing of the floor surface (12), and having an applicator brush (19) for the application of a fluid to the floor surface, where the two brushes can be replaced on the same mounting and attached as desired, and where the device (11) has a supply (31) for the fluid with an output device (38) for the fluid close to or directly on the brush (19), characterized in that the output device (38) for the fluid has output openings, which are aimed at an area relatively close in front of the applicator brush (19) in the processing direction, wherein the output device (38) for the fluid has multiple output nozzles distributed over the width of the applicator brush (19), wherein the output device (38) for the fluid is designed for pressurized output.
2. Device according to Claim 1, characterized in that the brushes are designed cylindrically, extending horizontally and transversely with respect to a processing direction, preferably with a width of 10% to 30% under the maximum width of the device (11).
3. Device according to Claim 1 or 2, characterized in that the applicator brush (19) for the application of the fluid has a plurality of brush strips (23) at a distance from one another, which extend over the width of the applicator brush and which can preferably be replaced individually.
4. Device according to one of the preceding claims, characterized in that the applicator brush (19) is also designed for polishing a floor covering (12) to which the fluid has been applied, preferably as a brush with horsehair.
5. Device according to one of the preceding claims, characterized by a cleaning brush, which has relatively firm bristles preferably consisting of nylon, for eliminating loose dirt and for processing a cleaning agent for the floor covering before or after the abrasion.
6. Device according to one of the preceding claims, characterized in that the brushes (19) are arranged in an end region of the device (11) along the processing direction (R), in particular at a front end, a hand guiding unit, in particular a push rod (40) preferably being arranged at the other end.
7. Device according to Claim 6, characterized in that, in the end region of the device (11) having the hand guiding unit (40), at least one running wheel (17a, 17b) is provided in such a way that at least part of the weight of the device (11) rests on the processing unit (19) and therefore on the floor surface (12), wherein in particular a distribution of the weight of the device (11) is such that at least half of the weight rests on the brush (19), preferably with a drive (25) arranged in the region above the brush.
8. Device according to one of the preceding claims, characterized in that outlet openings of the outlet device (38) for the fluid are adjustable in their position, in particular both in the distance from the floor (12) and in the angle thereto, wherein the output device is preferably arranged on a front end of a spray guard (28) or a covering around the processing unit (19).
9. Device according to one of the preceding claims, characterized in that the output nozzles have a spacing from one another of a few millimetres.
10. Device according to one of the preceding claims, characterized in that the output device (38) is pressurized by a pressure reservoir, wherein the pressure reservoir can preferably be operated or actuated manually by using a hand pump (33).
11. Device according to one of the preceding claims, characterized in that the output device (38) for the fluid has a metering unit, in particular as a valve (36) close to a connection (29) for fluid containers (31), wherein the metering unit (36) is preferably adjustable by means of a handle (42), arranged at a distance from the valve and connected by means of a Bowden cable or the like, on the hand guiding unit (40) according to Claim 6.
12. Device according to one of the preceding claims, characterized in that the output device (38) for the fluid has a connection for the fluid-carrying connection of a fluid container (31), in particular a threaded connection (29), preferably a threaded connection formed as an adapter for a plurality of different thread sizes of ready-made fluid containers.
13. Device according to one of the preceding claims, characterized in that a fluid container (31) is arranged in the region above the processing unit (19).
14. Device according to one of the preceding claims, characterized in that it has at least one guide wheel (45), which is designed to be narrow, such that it engages in grooves or joints (13) of a floor covering (12) laid as planks and is guided thereby in order to guide the entire device (11) along such a groove.
15. Device according to one of the preceding claims, characterized in that a covering is provided around the processing unit (19), extending as far as shortly in front of the floor surface (12) to be processed, preferably surrounding the circumference, in particular as a spray guard (28).
16. Device according to one of the preceding claims, characterized in that an extraction means for abrasion dust from the abrasive brush is provided, in particular with extraction openings close to the processing unit (19), preferably on a covering (28) according to Claim 15.

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